6. Configuration
6. 4. Communication faults
A Modbus fault is triggered if the Modbus card does not receive any Modbus requests at its address within a predefined time period (time out). All Modbus request types are taken into account (read, write, etc.). The time out is fixed at 10 s
The response of the drive in the event of a Modbus communication fault can be configured.
Configuration can be performed using the graphic display terminal or integrated display terminal using the [Network fault mgt] (CLL) parameter in the [1.8 FAULT MANAGEMENT]
| RDY | NET |
| +0.00Hz | 0A | ||
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| COM. FAULT MANAGEMENT | ||||||
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Network fault mgt | : |
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| Freewheel | |||
CANopen fault mgt | : |
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| Freewheel | |||
Modbus fault mgt | : |
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| Freewheel | |||
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| Quick |
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The values of the [Network fault mgt] (CLL) parameter, which trigger a [Com. network] (CnF) drive fault, are:
Value | Meaning |
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[Freewheel] (YES) | Freewheel stop (factory setting) |
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[Ramp stop] (rMP) | Stop on ramp |
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[Fast stop] (FSt) | Fast stop |
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[DC injection] (dCI) | DC injection stop |
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The values of the [Network fault mgt] (CLL) parameter, which do not trigger a drive fault, are:
Value | Meaning | |
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[Ignore] (nO) | Fault ignored | |
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[Per STT] (Stt) | Stop according to configuration of [Type of stop] (Stt). | |
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[fallback spd] (LFF) | Switch to fallback speed, maintained as long as the fault is present and the run command is not disabled. | |
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[Spd maint.] (rLS) | The drive maintains the speed at the time the fault occurred, as long as the fault persists and the run | |
command has not been removed. | ||
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The fallback speed can be configured via the [Fallback speed] (LFF) parameter in the [1.8 – FAULT MANAGEMENT]
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